My Approval Task doesn't show values in my fields

Hello everyone,

So I've created an Interface to aprove an Item after it has been added:

From my site, I create a new Item writting down name, code, type... and it gets inserted in my data base correctly, and generate a New Task to aprove it, but this task comes with the empty fields:

This is how my Input Task Confiuration Looks like:

Is the problem in the interface? Or in the task configuration? I don't know what to do, I feel like I've tried everything but I'm quite new to Appian and could use some help.

Thank you!!